Games like Alex: An Adventure Between the Ages
Games like Alex: An Adventure Between the Ages include LIMBO, Little Nightmares II, DISTRAINT: Deluxe Edition, There Is No Game: Wrong Dimension, and Little Nightmares. We matched them by the tags players give Alex: An Adventure Between the Ages on Steam (Casual, Adventure, Action-Adventure, Side Scroller, and 2D): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Adventure · Indie · Atmospheric

Little Nightmares II
Shared: Adventure · Horror · Atmospheric

DISTRAINT: Deluxe Edition
Shared: Adventure · Indie · 2D

There Is No Game: Wrong Dimension
Shared: Adventure · Casual · Indie

Little Nightmares
Shared: Adventure · Atmospheric · Horror

Pinstripe
Shared: Adventure · Casual · Indie

The Room
Shared: Adventure · Atmospheric · Puzzle

Little Inferno
Shared: Casual · Indie · Funny

Gorogoa
Shared: Casual · Indie · Atmospheric

Pikuniku
Shared: Adventure · Casual · Indie

GRIS
Shared: Adventure · Atmospheric · Indie

Thank Goodness You're Here!
Shared: Adventure · Casual · Funny

Stray
Shared: Adventure · Atmospheric · Singleplayer

Firewatch
Shared: Adventure · Atmospheric · Singleplayer

Firework
Shared: 2D · Indie · Horror

Scribblenauts Unlimited
Shared: Casual · Adventure · 2D

Nihilumbra
Shared: Adventure · Casual · Indie

Iris.Fall
Shared: Adventure · Casual · Indie

Donut County
Shared: Casual · Funny · Adventure

Sally Face - Episode One
Shared: Adventure · Indie · Horror

Hello Neighbor 2
Shared: Adventure · Action-Adventure · Horror

Rusty Lake Paradise
Shared: Adventure · Indie · Atmospheric

DISTRAINT 2
Shared: Side Scroller · Atmospheric · Horror

Moncage
Shared: Casual · Adventure · Indie